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近年来,三聚氰胺、瘦肉精、苏丹红等食品安全事故频发,食品安全检测变得具有更加重要的意义。食品安全检测包括食品中各种致病微生物的检测、各种农兽药残留的检测、种有害毒素的检测以及各种非法添加物等危害因子的检测等,现阶段传统的基于大型仪器的检测方法仍被大量用于食品安全的相关检测和确证,如有气相色谱法、高效液相色谱法以及色谱-质谱连用技术等,这些方法在应用到现场快速检测时经常会受到各方面的制约。因此,食品安全快速检测应运而生,而基于纳米材料的检测新方法研究是其中重要的一个方向,本刊记者幸采访到合肥工业大学生物与食品工程学院陈伟教授,请他介绍最新的基于纳米材料的食品安全快速检测方法研究进展。 相似文献
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从形态、细胞、生化以及分子标记4个方面就甜菜丛根病的检测方法进行阐述,比较各种方法的优缺点,提出各种鉴定方法应根据具体情况使用。4种检测方法分别是表型鉴定法、解剖学鉴定法、酶联免疫吸附法以及RT—PCR法。 相似文献
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Microencapsulation of Oils: A Comprehensive Review of Benefits,Techniques, and Applications 总被引:1,自引:0,他引:1
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Amr M. Bakry Shabbar Abbas Barkat Ali Hamid Majeed Mohamed Y. Abouelwafa Ahmed Mousa Li Liang 《Comprehensive Reviews in Food Science and Food Safety》2016,15(1):143-182
Microencapsulation is a process of building a functional barrier between the core and wall material to avoid chemical and physical reactions and to maintain the biological, functional, and physicochemical properties of core materials. Microencapsulation of marine, vegetable, and essential oils has been conducted and commercialized by employing different methods including emulsification, spray‐drying, coaxial electrospray system, freeze‐drying, coacervation, in situ polymerization, melt‐extrusion, supercritical fluid technology, and fluidized‐bed‐coating. Spray‐drying and coacervation are the most commonly used techniques for the microencapsulation of oils. The choice of an appropriate microencapsulation technique and wall material depends upon the end use of the product and the processing conditions involved. Microencapsulation has the ability to enhance the oxidative stability, thermostability, shelf‐life, and biological activity of oils. In addition, it can also be helpful in controlling the volatility and release properties of essential oils. Microencapsulated marine, vegetable, and essential oils have found broad applications in various fields. This review describes the recognized benefits and functional properties of various oils, microencapsulation techniques, and application of encapsulated oils in various food, pharmaceutical, and even textile products. Moreover, this review may provide information to researchers working in the field of food, pharmacy, agronomy, engineering, and nutrition who are interested in microencapsulation of oils. 相似文献
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Malongil B. Reena Belur R. Lokesh 《International Journal of Food Science & Technology》2012,47(1):203-209
The effect of feeding blended and interesterified oils containing palm oil (PO) and rice bran oil (RBO) on serum and liver lipids was evaluated in rats. The PO and RBO were blended to contain saturated, monounsaturated and polyunsaturated fatty acids in the proportion of 1:1.5:1. The blended oil was subjected to transesterification reaction using immobilized lipase, lipozyme IM‐RM. Rats were fed a diet containing blended or interesterified oils for 8 weeks. Rats fed PO showed significantly higher levels of cholesterol in serum and liver as compared to those given RBO, blended oil of PO with RBO or interesterified oil. Rats fed blended oils showed a significant decrease in serum cholesterol by 51% compared to rats fed PO. Feeding interesterified oil to rats resulted in decrease in serum cholesterol by 56% compared to rats fed PO, which was 10% lower compared to that observed in rats given blended oil. The present study indicated that a combination of PO with RBO can significantly lower serum lipids in rats as compared to those given diet containing PO alone. 相似文献
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为解决单一食用油中营养组分缺陷问题,以大豆油、橄榄油、鱼油和亚麻籽油为基料油,测定其酸值、过氧化值、水分及挥发物含量和脂肪酸组成,然后按照中国营养学会关于脂肪酸推荐摄入量的要求,依据不同基料油的脂肪酸组成计算其配比并配制调和油,最后测定调和油的营养成分。结果表明:大豆油、橄榄油、亚麻籽油、鱼油的酸值、过氧化值、水分及挥发物含量均符合相关国家标准,4种油脂配制调和油的最适配比为45%、45%、8%、2%;调和油中主要微量营养成分及其含量为角鲨烯2.18 mg/kg、β-胡萝卜素0.474 mg/kg、α-生育酚73.6 mg/kg、β-生育酚0.6 mg/kg、γ-生育酚132.0 mg/kg、δ-生育酚20.4 mg/kg、总甾醇5 700 mg/kg。所得调和油符合中国营养学会关于脂肪酸推荐摄入量的要求,是一种营养平衡调和油。 相似文献
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以马铃薯淀粉为原材料,与水进行模拟,在180 ℃条件下对马铃薯淀粉凝胶样品进行常压油炸,研究油炸样品中总油脂含量,以及各部分油脂含量的分布情况。结果表明:随着水分含量的增加,马铃薯淀粉凝胶体系油炸样品的总油脂含量、表面油脂含量和表面渗透油脂含量呈逐渐增加的趋势。随着油炸时间的延长,马铃薯淀粉凝胶体系油炸样品的总油脂含量和组织结构油脂含量呈逐渐增加的趋势,表面渗透油脂含量呈逐渐降低的趋势。随着水分含量的增加,表面渗透油脂含量在油炸样品总油脂含量中占据最大部分,其次是组织结构油脂含量,最少的是表面油脂含量。不同部分油脂含量的变化呈现一定的规律性,但变化幅度有一定的差异。 相似文献
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中国植物油料生产和贸易:现状、变化及前景 总被引:4,自引:1,他引:4
我国作为植物油料生产大国、消费大国及贸易大国,研究入世对我国油料生产和贸易影 响、进而判断未来变动趋势有着重要意义。该文首先对我国植物油料生产、贸易情况进行简单梳理; 在此基础上,重点分析入世后植物油料生产贸易变化及主要影响因素;最后对中国植物油料生产、 贸易未来发展趋势进行简单判断,并提出对策建议。 相似文献